Can the silicone foldable water cup be filled with boiling water?

Generally speaking, silicone water cups are safe. The silicone water bottle is made of environmentally friendly organic silicone. Temperature resistance -40-220 degrees, durable and never deformed. So you can use a silicone cup to drink hot water. It can be folded into a pocket for use.

Food silicone is an inorganic polymer colloidal material made by polycondensation of silicic acid, the main component is mSiO2nH2O. It has good chemical stability and does not react with any acid or alkali except in two very special cases of caustic alkali and hydrofluoric acid. It is often used in products with high safety requirements such as baby pacifiers and feeding bottles.

The silicone folding cup is a kind of folding cup that is convenient to carry, hygienic in use, and has a double-layer cup wall. The two adjacent sections of the outer wall are connected by a thread. The outer wall thread rotation drives the inner wall to expand and contract up and down to achieve the folding and stretching functions of the cup.